Experimental Study of Characteristics of Supercavity Influenced by Surfactant Drag Reducer 表面活性剂减阻剂对超空泡特性影响实验研究
A series of underwater vehicle model experiments for the supercavity shape property are carried out at high speed water tunnel with ventilation method. 在高速水洞中运用人工通气方法进行了航行体模型超空泡形态特性的系列实验研究。
Numerical simulation on ventilation rates of ventilated supercavity 通气超空泡通气率影响的数值仿真研究
Experimental research and numerical simulation of supercavity drag reduction of a high speed projectile 高速射弹超空泡减阻试验研究与数值模拟分析
Some problems in study of ventilated supercavity 通气超空泡研究中的几个问题
Experimental results show that supercavity length increases with ventilation coefficient increasing at constant velocity. 研究结果表明,来流速度不变时,空泡长度随通气率的增加而增加,阻力系数随空泡长度的增加先递增后递减;
Experimental study of the drag reduction of ventilated supercavity of underwater bodies 水下航行体通气超空泡减阻特性实验研究
Experimental Investigation on the Incipiency and the Shape of Supercavity for Slender Bodies with Different Headforms 头形对细长体超空泡生成与外形影响的实验研究
Experimental research on shape and drag characteristics of ventilated supercavity on underwater bodies 水下航行体通气超空泡形态及阻力特性试验研究
Based on many documents at home and abroad and a series of ventilated supercavity experiments conducted in water tunnel, some problems in experimental study of ventilated supercavity are summarized and discussed. 根据在水洞中所作的系列通气超空泡试验,以及国内外的大量相关文献,综述和探讨了通气超空泡实验研究中的几个主要问题.主要内容包括通气超空泡试验中的相似准则考虑;
A numerical simulation of the cavity, supercavity flow 二维空化、超空化流动的数值模拟
The results of simulation indicate that there is a critical value for ventilation direction to transfer sheet cavity into supercavity. 计算结果表明:在通气空泡的形成过程中,通气方向角存在着一个临界值,使得空泡形态由片状空泡过渡到超空泡;
Experimental investigation of ventilated supercavity on symmetrical underwater bodies 轴对称航行体通气超空泡的特性实验研究
Viscous drag coefficient has no direct relations with acceleration, which is mainly related to supercavity shape and vapor volume fraction in supercavity. 模型的粘性阻力系数与加速度没有直接的联系,它主要与超空泡的形态和模型壁面上的含汽率有关。
The influence of Froude Number on the length and shape of vertical supercavity is analyzed. The change history of unsteady supercavity's length and shape are investigated when the wedges angel or cavitation number is changed in aperiodic time-dependence, especially in high-frequency impulse. 给出了Froude数对铅垂超空泡长度和形状的影响,以及楔角或空化数作非周期变化,特别是较高频率脉冲变化时,超空泡长度和形状的非定常变化过程。
Measurement of ultra-low losses in optical supercavity 超高精细度光学腔中低损耗的测量
In order to form supercavity at lower velocity and explore drag reduction by supercavity, experiments of ventilated supercavity on symmetrical underwater bodies have been performed in water tunnel. 为了研究超空泡的减阻效果,保证在较低流速下生成超空泡,在水洞中开展了水下航行体通气超空泡的实验研究。
Investigation of supercavity shapes for two-dimentional hydrofoil with given separated point 分离点已知的二维水翼超空泡形状研究
The investigation shows that the length and aspect ratio of ventilated supercavity decreased when ventilated cavitation number increased, and the drag coefficient of vehicle decreased when the aspect ratio increased. 研究表明,通气超空泡的长度和长细比都随通气空化数的增大而减小,航行体阻力系数则随长细比增大而减小。
Supercavity and double-cavity pattern at zero and non-zero angle of attack were obtained. 得到了零攻角和非零攻角情况下的双空泡及超空泡形态。
A series of experiments about supercavitating flow around underwater vehicle are conducted in a high-speed cavitation water tunnel to investigate the pressure distribution in the supercavity and the properties of rear flow field near the supercavity. 利用循环式空泡水洞,对航行体模型的通气超空泡内压强分布及其对空泡尾部流场的影响情况进行了实验研究。
Therefore, it is necessary to study the principles as to unsteady supercavity. A numerical discretization method solving the singular integral equations is employed for studying the problems of unsymmetrical hydrofoil with steady supercavity. 因此有必要研究非定常超空泡的规律。本文首先将一种求解奇异积分方程的离散化数值方法应用到研究非对称水翼的定常超空泡问题。
Because of the complexity of supercavity, the methods which included the self-programming and the commercial software were applied to simulate the shape property of unstability supercavity. 由于超空泡流动的复杂性,本文采用自编程序和商用软件相结合的方法对非定常超空泡的形态特性进行数值仿真研究。
The potential theory neglects the vapor in the supercavity, because the mass in the cavity is so tiny that its inertial applies little effect on the dynamics of the water flow. 势流方法,不考虑空穴内汽体;这是因为汽体质量太小,其惯性对水流动力学条件影响很小。
And there are configuration simulations of supercavity around the supercavitating vehicle under the ideal condition or the condition considering various factors. 并对运行体周围形成的空泡在理想条件下及考虑到各影响因素条件下进行形态仿真,并进行仿真的结果分析。
The radius and resistance coefficient of supercavity is gained by the engineering predigestion method. 运用工程简化方法推导了超空泡半径以及阻力系数。
The supercavity technology can significantly avoid the viscous drag between water and the body moving in water, and for some case the drag of supercavitating body is possible to reach the values comparable as in the air. 超空泡技术可以极大地避免水与航行体表面的粘性阻力,在某些情况下超空化航行体的阻力可以达到与空气中的相当。
Two classes of methods based on the Euler formulation, i.e. potential theory and transportation equations with two kinds of cavitation models, are the two main ways for studying the supercavity flows. 基于Euler描述研究空穴流的方法,主要包括势流理论和流体输运方程结合两类空化模型的方法。
The supercavity vehicle is an underwater high-speed weapon which is enwraped by the supercavity. 超空泡运动体是一种依靠超空泡包裹的水下高速武器。
The supercavity is the cavitated phenomenon, i.e. cavity. 其所依靠的超空泡就是空化现象,也称空穴现象。